USGS Streamgage 13015000
Gros Ventre River at Zenith, WY
Gros Ventre River at Zenith, WY is USGS streamgage 13015000 in Wyoming, monitoring river discharge in hydrologic subbasin 17040102. It sits on the Gros Ventre River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 683 square miles. Discharge records at this site go back to 1917. Typical flow runs near 263 cfs in July and 134.9 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
Gauge details
- State
- Wyoming
- Drainage area
- 683 sq mi
- Gauge elevation
- 6,316 ft
- Subbasin (HUC-8)
- 17040102
- Coordinates
- 43.55722, -110.76278
- USGS site number
- 13015000
- Records begin
- 1917-01-01 (109 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Gros Ventre River at Zenith, WY. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 65.3 | 72 | 78.8 | ||
| 57.1 | 67.7 | 76.6 | ||
| 52 | 64.7 | 76.8 | ||
| 48.1 | 61.9 | 75.3 | ||
| 44.5 | 59 | 73.5 | ||
| 42.2 | 57 | 73.1 | ||
| 40.2 | 56.6 | 76.8 | ||
| 38.3 | 55.1 | 75.7 | ||
| 35.9 | 53.6 | 76.5 | ||
| 33 | 50.9 | 74.9 | ||
| 31.3 | 49.7 | 76.3 | ||
| 28.9 | 47.4 | 74.7 | ||
| 26.8 | 45.5 | 74.1 | ||
| 25.8 | 44.9 | 76.4 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 109 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
Only 11 of 12 months have enough record to summarize; the rest are omitted.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| February | — | 104.7 | — | |
| March | — | 96.9 | — | |
| April | 42.2 | 134.9 | 297.8 | |
| May | 177.3 | 642.7 | 1,828.7 | |
| June | 177.1 | 1,052.4 | 2,562 | |
| July | 13.9 | 263 | 1,174.2 | |
| August | 3.5 | 44.8 | 329.9 | |
| September | 0.2 | 32.9 | 148.4 | |
| October | — | 63.4 | — | |
| November | — | 67 | — | |
| December | — | 29.5 | — |
All values in cubic feet per second (cfs).
Common questions
- When does Gros Ventre River at Zenith, WY normally run highest?
- June, on the long-term record. The median daily flow that month is about 1,052.4 cfs, against 29.5 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Gros Ventre River at Zenith, WY?
- It depends on the month. In April, half of days historically fall near 134.9 cfs, with the middle 80% of days between 42.2 and 297.8 cfs. The month-by-month table on this page gives the full range.
- How long has Gros Ventre River at Zenith, WY been measured?
- Discharge records at USGS site 13015000 begin in 1917, about 109 years, covering roughly 4,727 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Gros Ventre River at Zenith, WY?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Gros Ventre River at Zenith, WY?
- The gauge sits at 43.55722, -110.76278, in Wyoming, in hydrologic subbasin 17040102, at an elevation of about 6,316 feet, draining roughly 683 square miles.
- Can I use Gros Ventre River at Zenith, WY data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Gros Ventre River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Gros Ventre River in full.
- Gros Ventre River Ab Upper Slide Lake, near Kelly, WY 407 sq mi
- Gros Ventre River at Kelly, WY 622 sq mi
- Gros Ventre River at Zenith, WY this page